网格环境下一种基于招标的信任评估模型  

A Kind of Trust Appraisal Model Based on Bids in Grid

作　　者：陈超[1] 王汝传[1] 张琳[1] 邓勇[1] 

机构地区：[1]南京邮电大学计算机学院,江苏南京210046

出　　处：《南京邮电大学学报（自然科学版）》2009年第5期59-64,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60573141;60773041);江苏省自然科学基金(BK2008451);国家高技术研究发展计划(863计划)(2007AA01Z404;2007AA01Z478);南京市高科技项目(2007软资127);现代通信国家重点实验室基金(9140C1105040805);江苏省博士后基金(0801019C);江苏高校科技创新计划(CX08B-085Z;CX08B-086Z)资助项目

摘　　要：为了提高信任模型中信任查找的效率和更有效的防止恶意推荐,对在网格环境下的信任模型引入了招标的思想以及改进了信任更新机制。首先由评估者向资源实体发出招标信息,资源实体根据招标信息投标或不投,评估者收到资源实体的投标申请书,就只需在已发投标申请的资源实体中进行信任查找,然后与符合条件的资源实体签订合约;在信任更新机制中将推荐行为发生后总体信任值作为较真实的信任值,与中间实体推荐信任值比较,根据二者的误差生成反馈,调整对此实体的信任度。实验表明信任模型在引入招标机制和改进了信任更新机制后,不仅调动了资源节点的主动性,实现了用户和资源的互动,提高了信任查找的效率,而且能够更好更有效的防止恶意推荐。In order to raise the efficiency of the research and prevent of bad recommendation, the bid and trust renewal improved are introduced into a trust mode in grid in this paper. The valuators send the bid information to the resources entities ,whether the resources entities bid according to the bid information, if the valuators receive bid applications sent by the resources entities, than they just only research trusted entities in the resources entities that they have send the bid applications ,than the valuators sign the contract with the resources entities which accord with the conditions. The total trust value is used to be the quite real trust value after recommendations in the trust renewal, it will be compared with recommendation trust value, and the feedback will be made by the distance between them, than the trust value of the entity will be adjusted according the feedback. The experiments indicate that the trust model that the bid and trust renewal improved are introduced in, not only mobilizes the enthusiasm of the resource entities, carries out the interaction of the users and the resources, raises the efficiency of the research, but also do better in preventing of bad recommendations.

关 键 词：网格 信任 招标 信任合并 信任更新 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]